Lady anime watchers have compiled a concise ranking of the anime that can be watched again and again without becoming stale – with the animated film powerhouse that is Studio Ghibli as usual dominating nicely, which may be as well considering the studio is now on “hiatus”…

The ranking, which as usual owes as much to its biased sampling technique as it does the merits of the works themselves:

I would like to see a list of the anime that made a cultural impact in the industry and it's fans overall (minus movies lest Ghibli clutter the list). I would like to see what besides Dragon Ball, Sailor Moon, Gundam, and the shonen giants steered the course of the manga and anime people like today. For example:
K-On - a show that was followed by an increasing number of slice of life moe blobs
Oreimo: - a show that generated interest in adaptations of novels with long winded titles
Cowboy Bebop - the gateway anime to many westerners, especially Americans
Evangelion - exploring a psychological mind fuck into a weak (by design) protagonist with power.
Pokemon - the first notable cash grab franchise (so to speak)

K-On itself was not a slice of life anime, but science fiction. I fear many who did not like it missed that storyline completely. In novels science fiction part is the main thing. Yuki & The Great Data Overmind, do you get it, Haruhi haters?

.....the only who make a good decent impact in the anime be Cowboy Bebop the rest, K-on, evangelion and pokemon are only franchises for sell tons of stupid things to otakus who have the taste of a belieber mister.